need some help just got a cam for my 450 from ESR. took the old one out and lost the timing marks?? dont know where or how to point them ??? can any one help me? know of any web site out there? thanks

 

go to www.gtthunder.com look under yfz they got a good pict that might help??

 

I'm assuming that there is a timing mark on the new cam...

Pretty much straight out of the manual:

Remove the timing mark accessing screw
Remove the crankshaft end accessing screw
Bring the piston to TDC (look inside the spark hole w/ a light to verify)
The timing marks on the cams ought to be on the "outside" and just above the head mating surface.

Now if you've done the ex cam mod (I'm assuming you have because it sounds like you're putting in a different intake cam) you ex cam timing mark ought to be one tooth "higher" than the stock setting relative to the head mating surface.

Make sense?

 

thanks for your info i will try to install today and get back with the results!

 

www.yfzzcentral.com (remove one z) has a good procedure on doing the cam mod, I know that's not what you are doing but maybe some of their illustrations might help you out. It's under "Reviews" and then "Tech".